2 years ago

I needdddd helppppppppp

Mathematics

1 answer:

Aneli [31]2 years ago

5 0

Answer:

Step-by-step explanation:

sum of angles in a triangle is 180

6n +1 +108+9n-4=180

15n = 180 -105

15n = 75

n= 75/15 = 5

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